Investments of Insurance Subsidiaries (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

A summary of the insurance subsidiaries’ investments at December 31 follows (dollars in millions):

	2021
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities	$	400	$	18	$	(2	)	$	416
Money market funds and other		125		—		—			125
	$	525	$	18	$	(2	)		541
Amounts classified as current assets									(103	)
Investment carrying value								$	438
	2020
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities	$	384	$	32	$	—		$	416
Money market funds and other		88		—		—			88
	$	472	$	32	$	—			504
Amounts classified as current assets									(116	)
Investment carrying value								$	388

Schedule of Maturities of Investments

Scheduled maturities of investments in debt securities at December 31, 2021 were as follows (dollars in millions):

	Amortized Cost		Fair Value
Due in one year or less	$	3	$	3
Due after one year through five years		128		135
Due after five years through ten years		176		183
Due after ten years		93		95
	$	400	$	416